Carton and closure therefor



Oct. 18, 1 938.

J. WAGNER CARTON AND CLOSURE THEREFOR Filed Feb. 21, 1956 ayne/W I INVENTOR Jay/hue:

BY 3 6" w,

ATTORNEYS iii Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE 2,133,930 I cAn'roN AND CLOSURE THEREFOR Joshua Wagner, Brooklyn, N. 'Y. Application February 21, 1936, Serial No. 65,007

Claims.

invention relates to improvements in open-ended cartons of corrugated paper-board and closures therefor, and contemplates the prothat has great strength against compressive forces against the sides of the cartonand in the plane of the closure and in a direction parallel to the edges of the container or carton.

Another object is to provide a closure of this character wnich is adapted to form a closure for an open-ended container and is adapted to provide reinforcing areas along the sides of the car- .ton near the mouth thereof. I

Another object is to provide a carton or container of the character described having a closure providing such reinforcement for the mouth of the carton, said areas having diagonal or obliquely directed flutes, said areas being bent out of the plane of the closure face and parallel to the sides of the carton; the end edges abutting each other at the corners of said areas whereby the corners of the open-ended carton are strengthened.

Another object of the invention is to provide a carton closure of this type which when ultimately formed and in position closing a carton-provides areas immediately surrounding the open end of the carton with reinforcement for its walls or sides and having corrugations in this area having its flutes running in opposite directions and oblique to lines of force normally received by the sides of the carton.

Another object is to provide overlapping rein- 40 forced corners in the closure having flutes running in oblique directions in the overlapped portions of the closure and of the sides of the carton.

In carrying out the invention I propose to em-v ploy corrugated board of the type illustrated in my previous Patent No. 1,620,174 for a body of the box although this is not essential since ordinary paste-board may be employed with advantage when used in connection with my novel closure. The novel type of corrugated board form- 'ing part of my invention is characterized by the flutes of the corrugated sheet being obliquely directed to parallel scores in the body of the blank, which when folded, form the edges of the body of the closure. adapted to conform to the walls of the container. I also propose to employ ablank for the top or bottom of an open container which comprises a composite sheet of adhesively united sheets including a corrugated sheet having parallel corrugations or flutes running parallel to two edges of the blank and running normal or at vision'of such closures having a corrugated sheet 7 right angles to the other two edges of the blank.

I further propose to provide. score lines to enable the folding of certain'areas in this closure blank out of the plane of the blank which score lines run diagonally to the direction of the flutes or corrugations. These areas provide flaps when folded on these score lines having corrugations running obliquely to the direction of the flaps. When inserted in an obliquely corrugated body, such a closure having flutes running oblique to these flaps would have corrugations running diagonally oppositely "to the direction of the corrugations in the body. This provides a perimetrical area immediately adjacent the bottom of s such a carton of great strength in that this area contains corrugations running in both directions. Another advantageous object is to provide a closure blank having flutes diagonal to a plurality of parallel scores in the face of the. blank whereby a double wall is formed by bending parts or areas out of the blanks plane, which areas are adapted to fold upon themselves andthus have oppositely directed flutes which are adapted to reinforce the side wall of a carton particularly at the open end of the carton. 1 I

I further contemplate an extremely strong and corner reinforcement in the closure for an open ended carton, said corner reinforcement comprising overlaying portions of the cover at the corners thereof having non-parallel flutes in their respective overlying faces.

Other advantages will appear and other objects will become obvious in the following description which has reference to the drawing in which Fig. 1 is a view of a blank for a carton of the open-ended type;

Fig. 2 is a blank for the closure for such a car ton as indicated by the blank of Fig. 1; I a

Fig. 3 is a fragmentary perspective view partly in section illustrating one form of the invention and the manner in whicha blank of the type of Fig. 1 and a blank of Fig. 2 are folded and brought together; g

Fi 4 is a modified form of the blank shown in Fi 2; i

Fig. 5 is a fragmentarycross-sectional view of the lower .end of an open-ended container with the closure in place;

Fig. 6 is a further modification of a closure blank; g

Fig. 7 is a perspective view of the blank shown in Fig. 6 formed: and

Fig. 8 is a fragmentarycross-sectional view of the lower end of a container with the closure in place showing the flaps positioned outside of the container.

Although the drawing is to illustrate the invention in connection with a square sided con- ,tainer or carton, it is to be understoodtthat this Referring to Fig. 1 a blank III comprises a corrugated sheet. II having adhesively secured thereto a facing or liner I2 which is of the identical outline as the corrugated sheet II. The corrugated sheet It may have flutes running obliquely to the edges of the blank. This blank may, however, be of the ordinary paste-board or corrugated board. The blank is scored as at I3 whereby it may be formed into a plurality of sides I4, and an end flap I5 may be provided to assist in Joining the edges of the carton to form an open mouthed carton. This flap I5 is employed to overlie-the remote face in the formation of a quadrangular carton, and theoverlapping parts stitched or stapled together. The flap l5 may be omitted in the formation of certain types of cartons having abutting edges, in which case a gummed tape may be used to secure the parts together. The manner in which the body of the carton is constructed is not an essential part of the invention and such blanks as illustrated may be severed on the bias, as indicated by my Patent No. 1,845,456. In such case gummed tape is also employed to adjoin abutting edges on the bias, which abutting edges may lie entirely in one'side of the carton or may be arranged to traverse two or more sides of the carton, as indicated in dot and dash lines in Fig. 1 and Fig. 3.

Fig, 2 illustrates a corrugated paper blank for forming the closure of an open-ended carton made of a blank as in Fig. 1. This closure blank I6 comprises a corrugated sheet I1 adhesively secured to a facing sheet I8 which is flat and uncorrugated. This blank may however be comprised of more than one corrugated sheet and more than one flat sheet, and may be of any multi-ply composition of pluralities of corrugated and flat sheets. The body of the carton may likewise be composed of more than one corrugated and one flat sheet adhesively united. .On the face of this blank I6 which is preferably square for reasons mentioned later, there is provided a plurality of scores I3 which are arranged to form a square boundary, said scores are preferably arranged with their adjacent sides meeting at the mid-points of the edges of the blank. Triangular areas are thus provided outward of the scores I3 which maybe bent on the scores out of plane of the blank. These areas may be secured in any manner to the sides of carton internally or externally thereof. Scores 23 parallel to the scores I9 may be provided in the triangular areas forming areas or flaps 2I, exteriorly of the scores 23 and to fold back upon areas or flaps 22 provided between the parallel scores I3 and 23. This is clearly illustrated in Fig. 3, where it will be seen that the flutes in the flaps M will run in an obliquely opposite direction to the flutes in the areas 22 when theflap 2| is folded on the score line to lie parallelly adjacent the area 22.

edges of the cap in the plane of the cap. In

most instances only one single corrugated sheet is required as one of the plys of a closure blank of the type illustrated, although a closure of this character is weak against compression in one direction diagonally of the closing faces transverse to the flute. A force so applied has a reaction, in tension, in the opposite diagonal direction which resists the first force particularly so, since this tension is taken parallel to the flutes.

It has also been found advisable to have two corrugated sheets having flutes running oblique or opposite to eachother, in the face 23, to provide maximum strength diagonally in the closure member. It will be noted in the type shown in Fig. 3 the corners of the flaps 22 do not abut; in the modification shown in Fig. 4, although a slightly larger blank is necessarily employed, right angular cut-outs are provided which edges 26 and 21 are formed on adjacent areas or flaps 22a between parallel scores I 3a and 23a which areas when bent up as in Fig. 3 will come into edge abutting contact thereby stiffening or bracing against each other and reinforcing the sides of the carton near the mouth thereof.

In some cases where extremely strong corners are desired it is proposed to employ a blank such as is illustrated in Fig. 6. A substantially square blank 26 is provided with a plurality of linear scores 21 forming a boundary of scores conforming to the mouth of the carton. These scores are spaced from the edges of the blank and extend completely across the blank adjacent score intersecting each other near the ends thereof. The flutes of the corrugated sheet in this blank are arranged to run diagonally of the edges of the blank. This provides scores which are arranged diagonally to the flutes. Areas 23 between the scores and the edges of the sheet are thus provided which are adapted to be'bent and secured to the sides of the carton. Each of these areas is provided with a slot 32 extending from the edge of the blank obliquely inward up to the point 23 where two adjacent scores at right angles meet. Bounded by the edges of the blank and by the scores 21 areas are provided which when folded on the extension of the scores 21, indicated, as at 21a are adapted to lie parallel and adjacent to the flaps 23 near the end thereof having the angular slot 32. An area 33 bounded by the edge of the blank and the angulated slot is adapted to lie parallelly adjacent the closing area or face 33 of the blank when the closure is in its folded position ready for insertion or embracement' oi the open end of the container. It will therefore be seen that a reinforced corner is thus had which in most cases is forced to take the brunt of rough handling.

In assembly of the blanks. body and closure to each other to form a complete carton or container, the :body is folded on the score lines I3 to form a rectangular tube. It will be understood however, that the body blank may have contiguous flaps along one edge thereof and adapted to form a closure of the usual and well known flap type in which case only one of the novel closures of Figs. 2, 4 or 6 is applied to the other open end of the body. Gummed tape is applied to maintain the abutting or joining edges of the body in fixed relationship. This gummed tape may be applied in any well known manner either simultaneously to both abutting edgesor first to one and later joined to the other, and

lie adjacent the body sides. Thus scores of such .7

nature are provided as to permit the bending of the areas 22 normal to the plane 'of the blank, and the areas 2| parallel to the areas 22. These areas 2| may be disposed outside of the area. 22 in the case of a closure adapted to fit internally of the formed body of the carton, (as illustrated mouth ofthe carton, which in Figs. 3.and or may be arranged to fold inside the areas 22 when the closure is adapted to flt outside the body in which case the flaps 2| would require additional scores to overlie the scores l9 to accommodate the point portion of the flap within the area of the portion 23.

In Fig. 3 with the parts folded and-ready for the insertion of the closure within the carton mouth, it will be noted that the areas 2| extended beyond the areas 22 and are thus capable of being gathered inwardly to facilitate the entry of the closure. The closure dimension being such as to be tight fitting in the body, without such extension of the areas 2|, insertion is dimcult. Tight fitting closures are preferable in that they apply no strain on whatever means is used tojoin them to the body, such'as staples or adhesive. 1

The application of the form of Fig. 4 is simi lar to that of Fig. 2, except that when folded the edges 26 and 21 come into abutting contact at the corner of the container, thereby assisting in the stiffness of the entire structure at the supplements the tightness of flt'of the closure.

In the formation of the blank of Fig. 6 the areas or flaps 28 are folded, on the score lines 21, into normal position of the area 34. The flaps 33 are folded normal to the areas 30 on the score line 21, the areas 30 are folded on the scores 21a normal to the area 28 from which it extends. These operations may be performed in any practical sequence thus producing a structure as seen in Fig. 7, where'the flaps 28 are parallel to the side walls of the carton, and the ends of each of these flaps overlie a portion 30 of an adjacent area at right angles thereto. The

' areas 30 may be'secured to contacting areas 28.

Thus a self sustaining and shaped closure is formed having a closing face havingnorm ally disposed flanges for internal or external engage-' ment with sides of a corresponding open end 'of a carton. An additional reinforcement ishad by the triangular flap 33 which will be arranged.

parallel to and adiacenkthe closing area 3lrto which it may be secured, upon folding along the scores as described.

The construction illustrated in Flg."-8 is a slight variation or modification of that shown in Fig. 5, the only difference being that the upwardly extending flaps 2| are located on the outside of the body of the carton instead of on the inside of the body of the carton, asshown in Fig. '5.

Having thus describedthe preferred embodiment of my invention it is to be understood that other modifications embodying the same principle as those illustrated may be had without departing from the spirit and scope of the invention as defined in the appended claims.

. What I claim is:

1. A closure for the open end of a carton coinprising a one-piece blank including a flat sheet and a corrugated sheet having parallel flutes, said sheets being adhesively united, a boundary of linear scores within the blank conforming to. I

, 3 the open end of the carton, two of said scores being arranged obliquely to-said flutes, a closing area for the open end of the carton confined within said boundary, and reinforcing areas for each of the sides of the carton, said reinforcing areas being bent out of the plane of the closing area and parallel to each other, the flutes in said reinforcing areas in each side being disposed obliquely opposite.

2. A closure for the open end of'a carton comprising a square sheet of adhesively united sheets, one of said sheets being corrugated and having flutes extending diagonally across the sheet, said sheet having a closing area having flutes extend- I ing diagonally thereacross, side flaps contiguous with said area having flutes therethrough diagonal to all the edges thereof, said flaps. adapted I to be secured to the sides of the carton, triangular corner flaps contiguous with said side flaps at one extremity thereof adapted to engage the other extremity of an adjacent side flap, and said side and corner flaps being bent in reverse directions ,to each other out of the plane of said closing area, with the flaps of each pair of side and corncr flaps extending parallel to each other.

3. A closure for the open end of a carton comprising a one-piece blank including a flat sheet and a corrugated sheet having parallel flutes, said sheets being adhesively united, a boundary of linear scores within the blank conforming to the open end of the carton, all of the said scores being arranged obliquely to said flutes, a closing 1 area for the open end .of the carton confined" of linear scores within the blank comforming to I the open end of the carton, all of said scores being arranged obliquely to said flutes, a closing area for the open end of the carton conflned' within said boundary and two reinforcing areas for each of the sides of the carton, said reinforcing areas being bent out of the plane of the closing area and parallel 'to each other, the flutes in said reinforcing areas being disposed obliquely opposite and one of said reinforcing areas for each side extendingbeyond the other reinforcing .area thereof to facilitate entry of the closure into the carton. I I

5. A closure for the open end of a carton comprising a one-piece blank including a flat sheet and a corrugated sheethaving parallel flutes, said sheets being adhesively united, a boundary of linear scores within the blank conforming to the open end of the carton, all of said scores being arranged obliquely to said flutes, a closing area for the open end of the carton confined withinsaid boundary, and rectangular and triangular reinforcing areas for each of the sides of the carton, said reinforcing areas being bent out of the plane of the closing area and parallel 'to each other, the flutes in said reinforcing areas in each side being disposed obliquely opposite.

. JOSHUA WAGNER. 

